gad·o·lin·i·um (g d l- n  - m)n. Symbol Gd A silvery-white, malleable, ductile, metallic rare-earth element obtained from monazite and bastnaesite and used in improving high-temperature characteristics of iron, chromium, and related alloys. Atomic number 64; atomic weight 157.25; melting point 1,312°C; boiling point approximately 3,000°C; specific gravity from 7.8 to 7.896; valence 3. See Table at element. [After Johan Gadolin (1760-1852), Finnish chemist.] |
gadolinium [ˌgædəˈlɪnɪəm]
n
(Chemistry / Elements & Compounds) a ductile malleable silvery-white ferromagnetic element of the lanthanide series of metals: occurs principally in monazite and bastnaesite. Symbol: Gd; atomic no.: 64; atomic wt.: 157.25; valency: 3; relative density: 7.901; melting pt.: 1313±°C; boiling pt.: 3273°C (approx.)
[New Latin, from gadolinite]
gadolinic adj
| gadolinium (gdl-n-m) Symbol Gd A silvery-white, malleable, ductile metallic element of the lanthanide series that has seven natural isotopes and 11 artificial isotopes. Two of the natural isotopes, Gd 155 and Gd 157, are the best known neutron absorbers. Gadolinium is used to improve the heat and corrosion resistance of iron, chromium, and various alloys and in medicine as a contrast medium for magnetic resonance imaging and as a radioisotope in bone mineral analysis. Atomic number 64; atomic weight 157.25; melting point 1,312°C; boiling point approximately 3,000°C; specific gravity from 7.8 to 7.896; valence 3. See Periodic Table. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  gadolinium - a ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth groupmetal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. gadolinite, ytterbite - a mineral that is a source of rare earths; consists of silicates of iron and beryllium and cerium and yttrium and erbium samarskite - a complex black mineral occurring in pegmatites |
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